option "input" i "Input image filename" string required
option "output" o "Output image filename" string required
-option "size" N "Size in pixel of extrusion" int yes
+option "size" N "Size in pixel of extrusion" int no default="1"
option "spacing" s "Spacing of the new dimension" double no default="1.0"
option "origin" - "Origin of the new dimension" double no default="0.0"
+option "like" l "Size, spacing and origin like this image" string no